Ber (Bit Error Rate) Measurement; Adjustment Points; Test Equipment Required For Alignment - Kenwood NX-5700 Service Manual

4.4

BER (Bit Error Rate) Measurement

(1) The Panel Test Mode is used to measure the BER (Refer
"4.2.1 Test mode operation features").
(2) Select "10" (P25 Phase1), "7" (P25 Phase2) and "7"
(NXDN Mode) for test signaling (Refer to "4.2.3 Frequency
and Signaling" (2) Test signaling).
Note:
"7" (NXDN Mode) can be selected only by PC test mode.
(3) Select a bandwidth (Narrow/Very Narrow) by pressing the
[  ] key. When P25 Phase1 or P25 Phase2 is selected, it
is not necessary to select a bandwidth.
(4) Select a test frequency ("4.2.3 Frequency and Signaling"
(2) Test signaling Test frequency).
(5) Measure the BER (Bit Error Rate) using the digital radio
tester.
Enter a standard input signal into the transceiver as a stan-
dard tone test pattern for P25, FSW+PN9 for NXDN.
(6) Adjust the input signal level to achieve the standard bit er-
ror rate (BER).
4.6

Test Equipment Required for Alignment

Test Equipment
1. Standard Signal
Generator (SSG)
2. Power Meter
3. Deviation Meter
4. Digital Volt Meter
(DVM)
5. Oscilloscope
6. Frequency Counter
7. Ammeter
8. AF Volt Meter (AF VM)
9. Audio Generator (AG)
10. Distortion Meter
11. Spectrum Analyzer
12. 4Ω Dummy Load
13. Regulated Power Supply
*The test equipment which is not used for adjustment is contained in this table.
Frequency Range
Modulation
Output
When performing the Frequency adjustment, the following accuracy is necessary.
• 0.003ppm
Use a standard oscillator for adjustments, if necessary.
Input Impedance
Operation Frequency
Measurement Capability
Frequency Range
Measuring Range
Input Impedance
Frequency Range
Frequency Stability
To measure the oscillating frequency of the internal clock 32766.00Hz~32770.00Hz for
RTC Correction Resolution 0.01Hz is better for accuracy adjustment.
Frequency Range
Voltage Range
Frequency Range
Output
Capability
Input Level
Measuring Range
(For example, if the BER is 0.86%, the display shows
"0.86".)
4.5

Adjustment points

RTC
RTC
Major Specifications
100 to 900MHz
Frequency modulation and external modulation
-127dBm/0.1uV to greater than -20dBm/22.4mV
50Ω
100 to 900MHz
Vicinity of 100W
100 to 900MHz
10mV to 20V DC
High input impedance for minimum circuit loading
DC through 30MHz
10Hz to 1000MHz
0.2ppm or less
20A or more
50Hz to 10kHz
1mV to 10V
50Hz to 5kHz or more
0 to 1V
3% or less at 1kHz
50mV to 10Vrms
DC to 1GHz or more
Approx. 4Ω, 10W
13.6V, approx. 20A (adjustable from 9V to 17V)
Useful if ammeter equipped
MAIN UNIT (XC1-038, XC1-040) (A/2)
Component side
(No.RA020<Rev.002>)1-43